Xoogler here. You are very, very wrong if you think there is no dissent within Google. There's plenty.
That said, this is a company that has massively succeeded with other bets that were "absolutely predictable they would never work." So just because something looks questionable doesn't mean it gets shot down.
(Now, IMO, Glass was a mistake - but for entirely different reasons than you describe. An elite fashion product cuts against Google's reputation as something for everybody, even IF it had succeeded.)
That said, this is a company that has massively succeeded with other bets that were "absolutely predictable they would never work." So just because something looks questionable doesn't mean it gets shot down.
(Now, IMO, Glass was a mistake - but for entirely different reasons than you describe. An elite fashion product cuts against Google's reputation as something for everybody, even IF it had succeeded.)